DR. LYDIA SUNKYUNG CHUN PSY.D
NPI 1417259524
Psychologist in Buena Park, CA

Active since November 22, 2010PECOS Enrolled
6251 STANTON AVE, BUENA PARK, CA 90621(714) 522-4438(714) 522-4430 Get Directions Write a Review

NPPES record last updated: December 2, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Lydia Sunkyung Chun Psy.d NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LYDIA SUNKYUNG CHUN PSY.D (NPI 1417259524) is an individual psychologist in Buena Park, California, licensed in California (PSY23921) and active in the NPI registry since November 2010. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1417259524
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. LYDIA SUNKYUNG CHUNCredential: PSY.D
Location Address6251 STANTON AVEBuena Park, CA 90621-2436
Mailing Address6251 Stanton AveBuena Park, CA 90621-2436 · (714) 522-4438 · Fax (714) 522-4430
Fax(714) 522-4430
Sole ProprietorYes
Enumeration DateNovember 22, 2010
Last NPPES UpdateDecember 2, 2024
NPPES CertifiedDecember 2, 2024
✔ NPI 1417259524 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in CA · PSY23921
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
6251 STANTON AVE, Buena Park, CA 90621

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Lydia Sunkyung Chun Psy.d is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Lydia Chun reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Clinical
156 SOCO DR
Fullerton, CA 92832
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Gift Inc

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Lydia Chun's NPI number?

The NPI number for Lydia Chun is 1417259524. It was assigned to this individual provider in the NPPES registry on November 22, 2010.

Where is Lydia Chun located?

Lydia Chun practices at 6251 Stanton Ave, Buena Park, CA 90621. The listed phone number is (714) 522-4438.

What is Lydia Chun's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Lydia Chun enrolled in Medicare?

Yes. Lydia Chun is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Lydia Chun's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lydia Chun reassigns Medicare benefits to G.I.F.T. Inc. (Fullerton, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lydia Chun's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Lydia Chun was last updated on December 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.